This paper focuses at charge estimators of piezoelectric actuators with a sensing capacitor. They have been claimed in the literature to be outperformed by their newly emerged competitors, charge estimators with a sensing resistor, widely known as digital charge estimators. This paper proposes a digital implementation of capacitor-based estimators and compares them with resistor-based ones both analytically and experimentally. Although, the sensing capacitors are normally bulkier than the sensing resistors used in newer resistor-based estimators; a resistor-based estimator needs to have a variable resistance to deal with different excitation frequencies satisfactorily; this is a major drawback which does not exist in capacitor-based estimators. Both capacitor-based and resistor-based estimators, if designed appropriately, are quite comparable in terms of voltage drop and range of measurable charge. This research concludes that capacitor-based estimators, with right design and implementation, can be still of wide use in nanopositioning.
|Title of host publication||2021 IEEE International Conference on Mechatronics, ICM 2021|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|Publication status||Published - 7 Mar 2021|
|Event||2021 IEEE International Conference on Mechatronics, ICM 2021 - Kashiwa, Japan|
Duration: 7 Mar 2021 → 9 Mar 2021
|Conference||2021 IEEE International Conference on Mechatronics, ICM 2021|
|Period||7/03/21 → 9/03/21|